# CVE-2021-4210: Code injection in BIOS

> Local attackers with elevated privileges can execute arbitrary code via a vulnerability in the NVME driver SMI callback function in Lenovo BIOS.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Apr 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-2gc6-xpq3-f7gm

## What is CVE-2021-4210?

CVE-2021-4210 is a medium-severity code injection vulnerability in Lenovo BIOS, published on 22 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A potential vulnerability in the SMI callback function used in the NVME driver in some Lenovo Desktop, ThinkStation, and ThinkEdge models may allow an attacker with local access and elevated privileges to execute arbitrary code.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-4210?

It affects 32 products.


Products: Lenovo A540-24icb Firmware, Lenovo A540-27icb Firmware, Lenovo Ideacentre 5-14imb05 Firmware, Lenovo Ideacentre Aio 3-22ada6 Firmware, Lenovo Ideacentre Aio 3-22iil5 Firmware, Lenovo Ideacentre Aio 3-22itl6 Firmware, Lenovo Ideacentre Aio 3-24ada6 Firmware, Lenovo Ideacentre Aio 3-24iil5 Firmware, Lenovo Ideacentre Aio 3-24itl6 Firmware, Lenovo Ideacentre Aio 3-27itl6 Firmware, Lenovo Ideacentre C5-14imb05 Firmware, Lenovo Ideacentre G5-14imb05 Firmware, Lenovo Stadia Ggp-120 Firmware, Lenovo Thinkcentre M700 Firmware, Lenovo Thinkcentre M700 Tiny Firmware, Lenovo Thinkcentre M70a Firmware, Lenovo Thinkcentre M75n Firmware, Lenovo Thinkcentre M800 Firmware, Lenovo Thinkcentre M810z Firmware, Lenovo Thinkcentre M820z Firmware and 12 more.

## How do I fix CVE-2021-4210?

No fix has been published for CVE-2021-4210 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-4210 being exploited?

There is no known exploitation of CVE-2021-4210 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-4210 and fix it if it is affected.

What it is: CVE-2021-4210 is a medium-severity code injection vulnerability in Lenovo BIOS, published on 22 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-4210 in the wild and no public exploit code.

Affected product: Lenovo BIOS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-4210/ (Markdown: https://insights.sbomify.com/CVE-2021-4210/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-4210
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-4210
- OSV: https://osv.dev/vulnerability/CVE-2021-4210

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-4210/
Summaries are generated and may contain mistakes; the official description above is the record.